[release] bump version to 12.3
fix crash loading JPEGs where m_cinfo.scale_num was set to 9 due to not finding a suitably sized scale factor. Thanks to tscheck
[osx/sdl] - fix possible NPE - fixes #14676
- fix crashing with libnfs 1.6 by bumping to 1.6.1 (which is 1.6.0 + a compile fix - 32bit time_t define was missing in the release target of vs project for libnfs)
[darwin] - move isMavericks helper to DarwinUtils
[osx/mavericks] - on mavericks don't use pbo rendering with intel gpus as it might result in distorted rendering (ripple)
Merge pull request #3820 from Memphiz/Frodo

[osx/mavericks] fix rippled rendering with intel gpu
Merge pull request #3821 from MartijnKaijser/12.3

[release] bump version to 12.3